food poisoning major types

1. FOOD POISONING
Saleem Sayed,
Final year part – I,
Preventive social medicine,
NIMRA INSTISTUTE OF MEDICAL SCIENCES.

2. What is food poisoning ?
• It is an acute gastroenteritis caused by
ingestion of food or drink contaminated
with either living bacteria or their toxins or
inorganic chemical substances & poisons
derived from plants and animals.

3. It can be characterized by :
• History of ingestion of a common food,
• Attack of many persons at the same time,
• Similarity of signs and symptoms in the
majority of cases.

4. Types of food poisoning
• It can be mainly divided into 2 types..
• 1.Non-bacterial : Caused by chemicals
such as arsenic, fertilizers, pesticides
certain plant and sea foods.
• 2. Bacterial : Caused by the ingestion of
food contaminated by living bacteria or
their toxins.

5. Bacterial food
poisoning may be of the following
types..

6. 1.Staphylococcal food
Poisoning
Organism: Staphylococcus aureus.
Source :Staphylococci are ubiquitous in nature,
and are found on the skin and in the nose and
throat of men and animals.
Incubation period: 1-8 hours commonly.
Cause of Illness: This form of food poisoning
is caused by a toxin produced by the bacteria.

7. 2.Salmonella food Poisoning
Organism: : Salmonella typhimurium
Source :Salmonellosis is primarily a disease
of animals. Man gets the infection from farm
animals and poultry.
Incubation period:12-24 hours commonly.
Cause of Illness: Salmonella bacteria are
surrounded by pili that permit the bacteria to
adhere to the intestinal lining. (endotoxin
produced)

8. 3.Botulism
Organism: : clostridium botulinum
Source :Soil, dust and the intestinal tract of
animal and enters food as spores.
Incubation period:18 to 36 hours commonly.
Cause of Illness: neurotoxins produced by the
bacteria.(types A-E toxins depending on the strain
of organism)

9. 4.Clostridium perfringens
food poisoning
Organism: : clostridium perfringens
Source : Found in faeces of humans and
animals, and in soil, water and air.
Incubation period:6 to 24 hours commonly.
Cause of Illness: The spores are able to
survive cooking, and if the cooked meat and
poultry are not cooled enough, they will
germinate.

10. 5.Bacillus food Poisoning
Organism: : bacillus cereus
Source : ubiquitous in soil, and in raw, dried and
processed foods.
Incubation period :
Emetic form- (1-6 hours)
Diarrhoeal form- (12-24 hours)
Cause of illness: spores can survive cooking and
germinate and multiply rapidly when the food is
held at favourable temperatures.

11. THANK YOU